Hacksaw



Feb. 16, 1932. H. A. STODDARD 1,845,731

. HACKSAW Filed Apr i1 22, 1929 2 Sheets-Sheet 1 mv'ENToR Harri A 15 foddaz af BY A110 NEY H. A. STODDARD HACKSAWY Feb. 16, 1932.

Filed April 22. 1929 2 Sheets-Sheet 2 Patented Feb. 16, 1932 uNrrsn s'rArss PATENT OFFICE KART A. s'ronnnzen, or wnsrrom, CONNECTICUT, nssxenon ro JACK nnnspavj or NEW HAVEN, CONNECTICUT Hacksaw Application filed April 22,

This invention relates to a new and improved hacksaw, preferably of the power ty e.

lt is the object of this invention, among other things, to provide a hacksaw of this character, so arranged that it will make a straight, angular or curved cut and at one or more places in the workpiece without disturbing its relative position in the securing 1 means, wherein the direction of the cut may be changed at the will of the operator while the saw is in motion and mounted and movable as a unit.

To these and other ends my invention consists of the hacksaw having certain details of construction and combinations of parts, as will be hereinafter described and more particularly pointed out in the claim.

In the drawings, like characters of referonce indicate like parts in both figures;

Figure 1 is a plan view of my new and improved hacksaw; and

Figure 2 is a fragmentary elevation thereof.

Referring to the drawings, 10 indicates the table, which mounted upon a plurality of legs 11 and to which is secured a bench vise 12 of the conventional type, designed to hold a workpiece between its jaws during the saw- 3o ing operation.

Fixed on this table is a base member 13, within which the slide 14: is mounted under the caps 15 secured to the base member 13.

Secured to this slide 14.- are the standards 16 and 17, within the former of which is a shaft 18 having thereon a spur gear 19, the teeth of which mesh into those of a pinion 20 on the armature 21 of the motor 22.

On the shaft 18 opposite the spur gear 19 the crank Journaled in the standard 17 is the shaft 2.4, having a counterbalance weight 25 fixed on one end thereof and a yoke bar 26 upon the opposite end, between the arms of which the bracket 27.

Shaft 28 is supported by the arms of the yoke bar 26 and projects through the hub of the bracket 27, substantially as shown in Figure 1. Secured on the outer end of this shaft by a coupling 29 is a saw frame 30, with- 1929. Serial m). 35:;057. j

rection bya collar 33 and connected with the crank. 23: by the connecting rod 34; Thus, by

rotation of the-shaft 18 under power obtained from the electric motor 22 a reciprocatory movement is imparted to the saw frame and blade therein through the rotation of the crank. '23.. 1 a 1 Fixed? in the bracket 27 is the rod 3'5, upon which is slidably mounted the coupling 36 that is secured to: thesaw frame 30..

At the outerend of this-rod is a handle 37 to provide means for manual manipulation of the position: ofthe saw and acent thereto upon the plate 38supporting thehandle 37 is a switch 39vvhich is connected with the motor 22 through the cable 40 so that the operator may conveniently control the action of the motor 22.

The slide 14 and all the mechanism associated therewith is moved within its mounting by the lever 41, which is pivotally connected with the plate 42 secured in a fixed position and with the slide through the link 43. i

In operation the workpiece is held within the vise 12 and the saw through the movement of the lever 4C1 brough to its position opposite the place where the out is to be made. The motor is then started and as the saw reciprocates the operator applies a slight downward pressure thereto through the handle 37 sufficient to make the cutting operation of the saw constant. Other cuts at different places may be made in the same workpiece without disturbing its relative position in the vise 12, by merely shifting the relative position of the rod 35 through the handle 37 and by manipulation of the same means this cut may be curved or be of any desired shape within the possibilities of the blade. This out can be made, of course, either upward or downward depending upon the relative position of the same in the vise.

The weight 25 forms a counter-balance for the saw frame and adjacent parts. Thus the blade will continue to occupy any position in which it has been placed until manually moved therefrom.

Obviously there are changes that may be made in the details of the mechanism and still produce the result outlined herein, and therefore within the scope of the appended claim, I claim such modifications as may be made without departing from the spirit of the invention.

What I claim as new is:

In combination with holding means for a work piece, a table, a slide transversely movable on said table, a vertical standard on said slide, a yoke member pivotally secured to said standard, a bracket member having one end extending between the arms of said yoke member, a reciprocating rod extending through the yoke and said end of the bracket member for pivotally supporting the latter, a saw carried by said rod for movement therewith, a second rod having one end secured in the opposite end of the bracket member and extending parallel to the first named rod, means for slidably supporting the saw on the second named rod member and power means mounted on said slide and connected to said first named rod for reciprocating said saw over the work piece, said second named rod being manually operable in a direction trans versely of the table for varying the angle of said saw.

In testimony whereof, I have hereunto aflixed my signature.

HART A. STODDARD. 

